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  • A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
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  • C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
  • C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
  • C07D239/28—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms
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  • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
  • C07D401/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links
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  • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
  • C07D405/12—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a chain containing hetero atoms as chain links

Definitions

• the present invention relates to 2-phenyl-6-aminocarbonyl-pyrimidine derivatives and their use as P2Yi 2 receptor antagonists in the treatment and/or prevention of peripheral vascular, of visceral-, hepatic- and renal-vascular, of cardiovascular and of cerebrovascular diseases or conditions associated with platelet aggregation, including thrombosis in humans and other mammals.
• Haemostasis is referred to as the natural balance of maintaining the fluidity of the blood in the vascular system and preventing excessive blood loss subsequent to blood vessel injury by rapid formation of a solid blood clot. After vascular damage, contraction of the vessels and platelet adhesion occur immediately followed by aggregation of the platelets, activation of the coagulation cascade and finally also of the fibrinolytic system. Haemostatic abnormalities can lead to excessive bleeding or thrombosis, both life -threatening situations.
• a series of antiplatelet agents have been developed over the past several years based on different mechanisms of action.
• the most widely used agent in antiplatelet therapy is aspirin, which irreversibly inhibits cyclooxygenase-1 and thereby affecting the thromboxane pathway.
• aspirin Although not optimally efficacious, treatment with aspirin remains the standard therapy against which new therapeutics are compared and judged.
• Other drags like the phosphodiesterase inhibitors dipyridamole and cilostazol, as well as the vitamin K antagonists (warfarin), are marketed but do not show all desirable features for such drags.
• GPIIb/IIIa receptor antagonists abciximab, eptifibatide, and tirofiban blocking platelet aggregation
• some orally active GPIIb/IIIa antagonists e.g. sibrafiban, xemilofiban or orbofiban
• Adenosine 5 '-diphosphate is a key mediator in platelet activation and aggregation interfering with two platelet ADP receptors P2Yi and P2Yi2.
• Antagonists of the platelet ADP receptor have been identified and display inhibition of platelet aggregation and antithrombotic activity.
• the most effective antagonists known so far are the thienopyridines ticlopidine, clopidogrel and CS-747, which have been used clinically as antithrombotic agents. It could be shown that these drags, via their reactive metabolites, irreversibly block the ADP receptor subtype P2Yi2.
• P2Yi2 antagonists like AR-C69931MX (Cangrelor) or AZD6140 have reached phase II clinical studies. These inhibitors are selective platelet ADP receptor antagonists, which inhibit ADP-dependent platelet aggregation, and are effective in vivo.
• Piperazino-carbonylmethylaminocarbonyl-naphtyl or -quinolyl derivatives have been described as ADP receptor antagonists in WO 02/098856 and WO 2004/052366.
• the present invention firstly relates to the compounds of formula I
• R 1 represents phenyl optionally substituted 1 to 3 times (preferably optionally substituted once or twice and more preferably optionally substituted once) by substituents each independently selected from the group consisting of halogen, methyl, methoxy, trifluoromethyl and trifiuoromethoxy;
• R represents an alkoxyalkoxyalkyl group, a dihydroxyalkyl group, a dimethoxyalkyl group or a (2,2-dimethyl-[l,3]dioxolan-4-yl)-alkyl group; or R represents a group of the formula
• X represents O, S, NH, NR 3 , SO or SO 2 ; - A -
• R represents alkyl or arylalkyl; or also R 2 represents 2,2,6,6-tetramethyl-piperidin-4-yl; each of R and R represents independently hydrogen or methyl; R 6 represents alkoxy; and Y represents alkylene or phenylalkylene, and Z represents -OH, -COOH, cyano, tetrazolyl or -COOR 7 , R 7 representing alkyl; and to the salts (in particular pharmaceutically acceptable salts) of such compounds.
• the compounds of formula I may contain one or more stereogenic or asymmetric centers, such as one or more asymmetric carbon atoms.
• the compounds of formula I may thus be present as mixtures of stereoisomers or preferably as pure stereoisomers. Mixtures of stereoisomers may be separated in a manner known to a person skilled in the art.
• the compounds of formula I are P2Yi2 receptor antagonists. Accordingly, they are useful in therapy (including combination therapy), where they can be widely used as inhibitors of platelet activation, aggregation and degranulation, as promoters of platelet disaggregation or as anti-thrombotic agents.
• halogen refers to fluorine, chlorine, bromine or iodine, preferably to fluorine, chlorine or bromine and more preferably to fluorine.
• alkyl refers to a straight or branched chain alkyl group containing 1 to 7 carbon atoms (e.g. methyl, ethyl, propyl, ⁇ o-propyl, butyl, ⁇ o-butyl, sec-butyl, tert-butyl, «-pentyl, neopentyl, /so-pentyl, «-hexyl, /so-hexyl, «-heptyl or ⁇ o-heptyl), and more preferably 1 to 4 carbon atoms.
• alkoxy refers to a saturated straight or branched chain alkoxy group containing 1 to 6 carbon atoms (e.g. methoxy, ethoxy, propoxy, ⁇ o-propoxy, butoxy, ⁇ o-butoxy, sec-butoxy, tert-butoxy, «-pentoxy, neopentyloxy, ⁇ o-pentyloxy, «-hexyloxy or ⁇ o-hexyloxy), and preferably 1 to 4 carbon atoms.
• alkoxyalkoxyalkyl refers to a straight or branched chain alkyl group of 1 to 4 carbon atoms wherein one hydrogen atom has been replaced by a straight or branched chain alkoxy group of 1 to 3 carbon atoms, the latter being itself substituted by a straight or branched chain alkoxy group of 1 to 3 carbon atoms.
• Methoxy alkoxy alkyl groups are preferred among alkoxyalkoxyalkyl groups.
• dihydroxyalkyl refers to an alkyl group as previously defined wherein two hydrogen atoms attached to different atoms of the alkyl group have been replaced by hydroxy (i.e. -OH) groups.
• hydroxy i.e. -OH
• dihydroxyalkyl include, but are not limited to, 2,3-dihydroxy-propyl.
• dimethoxyalkyl refers to an alkyl group as previously defined wherein two hydrogen atoms attached to different atoms of the alkyl group have been replaced by methoxy (i.e. -OCH3) groups.
• methoxyalkyl examples include, but are not limited to, 2,3-dimethoxy-propyl.
• (2,2-dimethyl-[l,3]dioxolan-4-yl)-alkyl refers to a straight or branched chain alkyl group of 1 to 4 carbon atoms wherein one hydrogen atom has been replaced by a 2,2-dimethyl-[l,3]dioxolan-4-yl group. Examples of (2,2-dimethyl-
• [l,3]dioxolan-4-yl)-alkyl include, but are not limited to, (i?)-2,2-dimethyl-[l,3]dioxolan- 4-ylmethyl and (5)-2,2-dimethyl-[l,3]dioxolan-4-ylmethyl (and in particular (i?)-2,2-dimethyl-[l,3]dioxolan-4-ylmethyl).
• aryl refers to an aromatic cyclic group with one, two or three rings, having from 6 to 14 carbon ring-atoms and preferably from 6 to 10 carbon ring-atoms, for example to phenyl or naphthyl groups (and notably to phenyl groups); in addition, the term “aryl” may also refer to the indanyl (e.g. indan-1-yl or indan-2-yl), tetrahydronaphtalene, biphenyl-4-yl and benzo[l,3]dioxolyl groups.
• aryl group (and in particular any phenyl group) as defined herein may be substituted with one, two or more substituents (preferably with one to three substituents, more preferably with one or two substituents and notably with one substituent), each independently selected from the group consisting of halogen, alkyl, alkoxy, hydroxymethyl, acetyl, methanesulfonyl, trifluoromethyl, trifluoromethoxy, carboxy, alkoxycarbonyl, amino, cyano and nitro.
• substituents preferably with one to three substituents, more preferably with one or two substituents and notably with one substituent
• substituents each independently selected from the group consisting of halogen, alkyl, alkoxy, hydroxymethyl, acetyl, methanesulfonyl, trifluoromethyl, trifluoromethoxy, carboxy, alkoxycarbonyl, amino, cyano and nitro.
• substituents preferably with one to three
• arylalkyl refers to an aryl group appended to the parent molecular moiety through an alkyl group wherein however the aryl group may be unsubstituted or substituted with 1 to 3 substituents selected independently from the group consisting of halogen, alkyl, alkoxy, trifluoromethyl and trifluoromethoxy.
• aralkyl include, but are not limited to, benzyl, 2-phenylethyl, 3-phenylpropyl and 2-naphth-2-ylethyl.
• alkylene refers to a straight and branched divalent saturated hydrocarbon chain group with one to six carbon atoms and preferably one to four carbon atoms.
• Representative examples of alkylene include, but are not limited to, methylene (-CH 2 -), ethylene (-CH 2 -CH 2 -), ⁇ -propylene (-CH 2 -CH 2 -CH 2 -) and ⁇ o-propylene (-CH 2 -CH(CH 3 )-).
• phenylalkylene refers to an unsubstituted divalent phenylalkyl group wherein the alkyl is as previously defined, said divalent group being attached to the rest of the molecule by, on the one side, one of the carbon atoms of the phenyl group and by, one the other side, one of the carbon atoms of the alkyl group.
• phenylalkyl refers to an alkyl group as previously defined wherein one hydrogen atom has been replaced by an unsubstituted phenyl group.
• Representative examples of phenylalkyl include, but are not limited to, benzyl, 2-phenylethyl and 3-phenylpropyl.
• the sign "*" placed near an atom will be used to designate the point of attachment of a radical to the rest of a molecule. For example:
• salts refers to non-toxic, inorganic or organic acid and/or base addition salts. Reference can be made to "Salt selection for basic drugs", Int. J. i > ⁇ m. (1986), 33, 201-217.
• room temperature refers to a temperature of 25°C.
• the term "about” placed before a numerical value "X” refers in the current application to an interval extending from X minus 10% of X to X plus 10% of X, and preferably to an interval extending from X minus 5% of X to X plus 5% of X.
• the term “about” (or alternatively the term “around") placed before a temperature "Y” refers in the current application to an interval extending from the temperature Y minus 10 0 C to Y plus 10 0 C, and preferably to an interval extending from Y minus 5 0 C to Y plus 5 0 C.
• the compounds of formula I will in particular be compounds of formula I CE
• R represents phenyl optionally substituted once by halogen or methyl
• R represents a methoxyalkoxyalkyl group, a dihydroxyalkyl group, a dimethoxyalkyl group or a (2,2-dimethyl-[l,3]dioxolan-4-yl)-alkyl group; or R represents a group of the formula
• m is 1 and n is 2 or 3, or m is 2 and n is 2; and X represents O, S, NH or NR 3 (and preferably O, NH or NR 3 ); R represents alkyl or phenylalkyl; or also R 2 represents 2,2,6,6-tetramethyl-piperidin-4-yl; one of R and R 5 represents hydrogen or methyl and the other represents hydrogen;
• R represents alkoxy; and Y represents alkylene or phenylalkylene, and Z represents -OH, -COOH, cyano, tetrazolyl or -COOR 7 , R 7 representing alkyl.
• ⁇ ⁇ R 1 represents phenyl optionally substituted once or twice by substituents each independently selected from the group consisting of halogen, methyl, methoxy, trifluoromethyl and trifluoromethoxy;
• ⁇ ⁇ ⁇ R >2 represents an alkoxyalkoxyalkyl group, a dihydroxyalkyl group or a (2,2-dimethyl-
• n 1 and n is 2 or 3, or m is 2 and n is 2; and X represents O, S, NH or NR 3 ; R represents alkyl or arylalkyl; or also R 2 represents 2,2,6, 6-tetramethyl-piperidin-4-yl;
• ⁇ ⁇ ⁇ Y represents alkylene or phenylalkylene, and Z represents -OH, -COOH, cyano or tetrazolyl;
• ⁇ ⁇ ⁇ R 6 represents alkoxy of 1 to 4 carbon atoms (for example ethoxy or «-butoxy).
• ⁇ ⁇ ⁇ R 1 represents phenyl optionally substituted once by halogen, methyl, methoxy, trifluoromethyl and trifluoromethoxy;
• R 2 represents an alkoxyalkoxyalkyl group or a (2,2-dimethyl-[l,3]dioxolan-4-yl)-alkyl group; or R represents a group of the formula
• m is 1 and n is 2 or 3, or m is 2 and n is 2; and X represents O, NH or NR 3 ; R represents alkyl or phenylalkyl; or also R 2 represents 2,2,6, 6-tetramethyl-piperidin-4-yl;
• ⁇ ⁇ ⁇ Y represents alkylene or phenylalkylene, and Z represents -OH, -COOH or tetrazolyl (and notably -OH or -COOH);
• R and R 5 represents hydrogen or methyl and the other represents hydrogen;
• ⁇ ⁇ R 6 represents alkoxy of 1 to 3 carbon atoms.
• X represents O, NH or NR 3 ;
• R represents alkyl or phenylalkyl; oorr aallssoo RR 2 rreepprreesseennttss 22,,22,,66,, 66--tteettrraammethyl-piperidin-4-yl;
• ⁇ ⁇ ⁇ Y represents alkylene or phenylalkylene and Z represents -COOH; - i i -
• ⁇ ⁇ ⁇ one of R and R 5 represents hydrogen or methyl and the other represents hydrogen; ⁇ ⁇ R represents alkoxy of 1 to 3 carbon atoms.
• ⁇ ⁇ ⁇ R 1 represents phenyl
• ⁇ ⁇ ⁇ R 2 represents a group of the formula
• X represents O, NH or NR 3 ;
• R 3 represents alkyl or phenylalkyl
• ⁇ ⁇ ⁇ Y represents alkylene and Z represents -COOH; ⁇ ⁇ each of R 4 and R 5 represents hydrogen; ⁇ ⁇ R 6 represents ethoxy.
• R 2 represents a group of the formula
• R 2 will preferably be selected from the group consisting of tetrahydropyran-4-yl, tetrahydrothiopyran-4-yl, l-methyl-piperidin-3-yl, 1 -benzyl-piperidin-4- yl and tetrahydrofuran-3-yl (R 2 being notably tetrahydropyran-4-yl, l-methyl-piperidin-3-yl, l-benzyl-piperidin-4-yl or tetrahydrofuran-3-yl, in particular tetrahydrofuran-3-yl).
• R 6 will preferably represent an alkoxy of 1 to 5 carbon atoms, especially an alkoxy of 2 to 4 carbon atoms. More preferably, when R 6 represents an alkoxy of more than 3 carbon atoms, the alkoxy chain will be linear; for example, when R is an alkoxy of 4 carbon atoms, R 6 being «-butoxy will be preferred.
• the compounds of formula I will be such that R represents an alkoxyalkoxyalkyl group, a dihydroxyalkyl group, a dimethoxyalkyl group or a (2,2-dimethyl-[l,3]dioxolan-4-yl)-alkyl group; such compounds will be collectively designated by "compounds of formula I L " throughout the specification and claims.
• the compounds of formula I L will preferably be such that:
• R 1 represents phenyl optionally substituted once or twice by substituents each independently selected from the group consisting of halogen, methyl, methoxy, trifluoromethyl and trifluoromethoxy;
• - R 2 represents an alkoxyalkoxyalkyl group, a dihydroxyalkyl group, a dimethoxyalkyl group or a (2,2-dimethyl-[l,3]dioxolan-4-yl)-alkyl group; each of R 4 and R 5 represents independently hydrogen or methyl;
• R 6 represents alkoxy; and
• Y represents alkylene or phenylalkylene
• Z represents -OH, -COOH, cyano, tetrazolyl or -COOR 7 , R 7 representing alkyl.
• the compounds of formula I L will at least have one of the following characteristics:
• ⁇ ⁇ ⁇ R 1 represents phenyl optionally substituted once by a substituent selected from the group consisting of halogen, methyl, methoxy, trifluoromethyl and trifluoromethoxy;
• ⁇ ⁇ ⁇ R represents an alkoxyalkoxyalkyl group, a dihydroxyalkyl group or a (2,2-dimethyl- [l,3]dioxolan-4-yl)-alkyl group;
• R 4 and R 5 represents hydrogen and the other represents hydrogen or methyl
• ⁇ ⁇ R 6 represents alkoxy of 1 to 4 carbon atoms
• ⁇ ⁇ ⁇ Y represents alkylene or phenylalkylene
• Z represents -OH, -COOH, cyano or tetrazolyl (and preferably Y represents alkylene, and Z represents -OH, -COOH or tetrazolyl).
• the compounds of formula I L will at least have one of the following characteristics:
• ⁇ ⁇ ⁇ R 1 represents phenyl optionally substituted once by a substituent selected from the group consisting of halogen, methyl and methoxy (and notably unsubstituted phenyl);
• ⁇ ⁇ ⁇ R represents an alkoxyalkoxyalkyl group or a (2,2-dimethyl-[l,3]dioxolan-4-yl)-alkyl group; ⁇ ⁇ each of R 4 and R 5 represents hydrogen;
• ⁇ ⁇ ⁇ R 6 represents alkoxy of 1 to 3 carbon atoms (in particular ethoxy);
• ⁇ ⁇ ⁇ Y represents alkylene (preferably -CH 2 -, -CH 2 -CH 2 - or -CH 2 -CH 2 -CH 2 - and more preferably -CH 2 -CH 2 -) and Z represents -COOH.
• R 2 represents 2,2,6,6-tetramethyl-piperidin-4-yl; such compounds will be collectively designated by "compounds of formula I R " throughout the specification and claims.
• the compounds of formula I R will preferably be such that R represents phenyl optionally substituted once or twice by substituents each independently selected from the group consisting of halogen, methyl, methoxy, trifluoromethyl and trifluoro methoxy.
• the compounds of formula I R will at least have one of the following characteristics:
• R 1 represents phenyl optionally substituted once by a substituent selected from the group consisting of halogen, methyl, methoxy, trifluoromethyl and trifluoromethoxy;
• R 2 represents a group of the formula
• X represents O, S, NH or NR 3 ;
• R 3 represents alkyl or arylalkyl; or also R 2 represents 2,2,6, 6-tetramethyl-piperidin-4-yl;
• R 4 and R 5 represents hydrogen and the other represents hydrogen or methyl;
• ⁇ ⁇ R 6 represents alkoxy of 1 to 4 carbon atoms;
• ⁇ ⁇ ⁇ Y represents alkylene or phenylalkylene, and Z represents -OH, -COOH, cyano or tetrazolyl (and preferably Y represents alkylene, and Z represents -OH or -COOH).
• the compounds of formula I R will at least have one of the following characteristics:
• ⁇ ⁇ ⁇ R 1 represents phenyl optionally substituted once by a substituent selected from the group consisting of halogen, methyl and methoxy (and notably unsubstituted phenyl);
• ⁇ ⁇ ⁇ R 2 represents a group of the formula
• X represents O, NH or NR 3 ,
• R represents alkyl or phenylalkyl
• R 4 and R 5 represents hydrogen; ⁇ ⁇ ⁇ R represents alkoxy of 1 to 3 carbon atoms (in particular ethoxy);
• ⁇ ⁇ ⁇ Y represents alkylene (preferably -CH 2 -, -CH 2 -CH 2 - or -CH 2 -CH 2 -CH 2 - and more preferably -CH 2 -CH 2 -) and Z represents -COOH.
• a further object of the invention is the compounds of formula I (or of formula I CE ) or their pharmaceutically acceptable salts as medicaments.
• the compounds of formula I and their pharmaceutically acceptable salts can be used as medicaments, e.g. in the form of pharmaceutical compositions for enteral or parental administration.
• the invention thus also relates to pharmaceutical compositions containing at least one compound according to this invention (notably a compound of formula I or I CE ), or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier, diluent or excipient.
• the invention relates to pharmaceutical compositions containing at least one compound of formula I (or of formula I CE ) and a pharmaceutically acceptable carrier, diluent or excipient.
• compositions can be effected in a manner which will be familiar to any person skilled in the art (see for example Remington, The Science and Practice of Pharmacy, 21st Edition (2005), Part 5, "Pharmaceutical Manufacturing” [published by Lippincott Williams & Wilkins]) by bringing the described compounds of formula I or their pharmaceutically acceptable salts, optionally in combination with other therapeutically valuable substances, into a galenical administration form together with suitable, non-toxic, inert, therapeutically compatible solid or liquid carrier materials and, if desired, usual pharmaceutical adjuvants.
• the compounds according to formula I and the pharmaceutically acceptable salt thereof may be used for the preparation of a medicament, and are suitable: for the treatment or prophylaxis of diseases including stable angina, unstable angina, myocardial infarction, embolism (including complications of atherosclerosis, notably embolic stroke), arterial thrombosis (including primary arterial thrombotic complications of atherosclerosis, notably thrombotic stroke), venous thrombosis (notably deep vein thrombosis), thrombosis secondary to vascular damage or to inflammation (including vasculitis, arteritis and glomerulonephritis), venoocclusive diseases, transient ischaemic attacks, peripheral vascular diseases, myocardial infarction with or without thrombolysis, myeloproliferative disease, thrombocythaemia, sickle cell disease, inflammatory bowel disease, thrombotic thrombocytopaenic purpura, haemolytic uraemic syndrome;
• diseases including stable an
• ⁇ ⁇ ⁇ for preventing thrombotic complications of septicaemia, adult respiratory distress syndrome, anti-phospholipid syndrome, heparin-induced thrombocytopaenia and pre- eclampsia/eclampsia; ⁇ ⁇ for preventing cardiovascular complications after certain surgery procedures (notably coronary revascularisation like angioplasty (PTCA), other vascular graft surgery, endarterectomy or stent placement) or after accidental trauma;
• PTCA coronary revascularisation like angioplasty
• a particular object of this invention is the use of a compound of formula I (or of formula I CE ), or of a pharmaceutically acceptable salt thereof, for the manufacture of a medicament for the uses listed above, and for the manufacture of a medicament for the treatment of occlusive vascular disorders in general.
• the invention relates to the use of a compound of formula I (or of formula I CE ), or of a pharmaceutically acceptable salt thereof, for the manufacture of a medicament for the treatment and/or prevention of occlusive vascular disorders as well as to the use of a compound of formula I (or of formula I CE ) for the manufacture of a medicament for the treatment and/or prevention of peripheral vascular, of visceral-, hepatic- and renal- vascular, of cardiovascular and of cerebrovascular diseases or conditions associated with platelet aggregation, including thrombosis in humans and other mammals.
• the invention further relates to the use of a compound of formula I (or of formula I CE ), or of a pharmaceutically acceptable salt thereof, for the preservation of blood products in vitro (e.g. the preservation of platelet concentrates), or for the prevention of occlusion in extra-corporeal blood or blood product treatment machines (such as renal dialysis machines or plasmapheresis machines).
• a compound of formula I or of formula I CE
• a pharmaceutically acceptable salt thereof for the preservation of blood products in vitro (e.g. the preservation of platelet concentrates), or for the prevention of occlusion in extra-corporeal blood or blood product treatment machines (such as renal dialysis machines or plasmapheresis machines).
• the invention also relates to methods of treatment for said disorders, said methods comprising the administration to a patient in need thereof of an effective amount of a compound of formula I (or of formula I CE ) or of a pharmaceutically acceptable salt thereof.
• the compounds of formula I (or of formula I CE ) can be prepared by the process described below.
• the compounds of formula 1.4 can then be obtained (Scheme 1) by hydrolysis of the corresponding compounds of formula I.I wherein Z' is -COOR 7 (R 7 being alkyl) under standard conditions well known to one skilled in the art.
• the tetrazole derivatives of formula 1.5 can be prepared (Scheme 1) by conversion of the corresponding cyano derivatives of formula 1.2 wherein Z' is -CN using the well-known methodology with sodium azide, optionally in the presence OfZnBr 2 .
• the compounds of formula 1.6 can be prepared (Scheme 1) by deprotection of the corresponding compounds of formula 1.3 wherein Z' is -O-PG and PG is a suitable protecting group for an alcohol function.
• Suitable alcohol function protection groups and protection and deprotection methods are well known to one skilled in the art (see notably "Protective groups in organic synthesis", Greene T. W. and Wuts P. G. M., Wiley- Interscience, 1999).
• the compounds of formula II can be prepared (Scheme 2) by coupling the piperazine derivatives of formula III wherein Y, Z', R 4 , R 5 and R 6 have the same meanings as in formula II with the compounds of formula IV wherein R has the same meaning as in formula II using standard peptide coupling methods such as PyBOP, in the presence of a suitable base such as NEt 3 , DIPEA or N-methylmorpholine and in a suitable solvent such as DCM, THF or DMF, preferably at a temperature around RT.
• a suitable base such as NEt 3 , DIPEA or N-methylmorpholine
• a suitable solvent such as DCM, THF or DMF
• the compounds of formula III can be prepared (Scheme 3) by coupling the piperazine derivative of formula V wherein R , R 5 and R have the same meanings as in formula III with a compound of formula VI wherein Y and Z' have the same meanings as in formula III, using standard peptide coupling methods such as HOBT, EDCI, DCC, PyBOP, benzotriazole-l-yl-oxy-tris-(dimethylamino)-phosphonium hexafluorophosphate, optionally in the presence of a suitable base such as NEt 3 , DIPEA or 7V-methylmorpholine and in a suitable solvent such as DCM, THF or DMF, preferably at a temperature around RT.
• a suitable base such as NEt 3 , DIPEA or 7V-methylmorpholine
• a suitable solvent such as DCM, THF or DMF
• the acetoacetate derivative of formula VIII (wherein R is alkyl) is reacted with an amidine of formula IX, optionally in the presence of a suitable base such as MeONa, in a suitable solvent such as EtOH, the mixture being preferably heated at a temperature between 60 and 90 0 C.
• a suitable base such as MeONa
• EtOH a suitable solvent
• the compound of formula X may be chlorinated using standard conditions (e.g. phosphoryl chloride at reflux).
• the compound of formula XI may then be demethylated using standard reagents such as BBr 3 , in a suitable solvent such as DCM, preferably at a temperature between -10 and 10 0 C; the intermediate alcohol of formula XII thus obtained can then be oxidised, using standard oxidising agents such as KMn ⁇ 4, in a suitable solvent such as water, dioxane, and preferably at a temperature around RT.
• standard oxidising agents such as KMn ⁇ 4
• a suitable solvent such as water, dioxane, and preferably at a temperature around RT.
• the compounds of formula V wherein R 4 and R 5 are both hydrogen can be prepared (Scheme 5) by reacting the piperazine derivative of formula XIII (wherein PG 3 is a suitable protecting group for an amine function) with the chloro derivative of formula R 6 -CO-C1 (wherein R 6 has the same meaning as in formula V) in the presence of a suitable base such as NEt 3 , DIPEA, N-methylmorpholine, in a suitable solvent such as DCM, THF or DMF, at a temperature preferably around RT.
• a suitable base such as NEt 3 , DIPEA, N-methylmorpholine
• the intermediates of formula XIV are converted into the compounds of formula V by cleaving off the protecting group PG using standard conditions for the deprotection of amines, and preferentially Pd/C in a suitable solvent such as MeOH, EtOH, THF or EA, or TFA or hydrochloric acid in a suitable solvent such as DCM, Et 2 O, dioxane or EA.
• a suitable solvent such as MeOH, EtOH, THF or EA, or TFA or hydrochloric acid in a suitable solvent such as DCM, Et 2 O, dioxane or EA.
• the compounds of formula V.I can be prepared (top of Scheme 5a) by direct coupling with a chloro derivative of formula R -CO-Cl. ⁇ ⁇
• a protection by an amine protecting group PG is first carried out.
• the intermediate of formula XV thus obtained is then coupled with a chloro derivative of formula R -CO-Cl and the coupling product of formula XVI is then deprotected as described above for the compounds of formula XIV.
• the disubstituted piperazine may be coupled to the chloro derivative R 6 -CO-C1 according to a procedure described by MJ. Bishop et al. in J. Med. Chem. (2003), 623-633, yielding the corresponding piperazine derivative of formula V.
• these compounds can be prepared according to standard methods by the skilled artisan from commercially available compounds.
• a Zorbax ® column (Agilent SB.Aq 5 ⁇ m, 4.6x50mm) was used.
• the eluent flow rate was 4.5 ml/min and the characteristics of the eluting mixture proportion in function of the time t from start of the elution are summarized in the table below (a linear gradient being used between two consecutive time points):
• a Zorbax® column (PrepHT SB.Aq 5mm, 21.2x50mm) was used.
• the eluent flow rate was 95 ml/min and the characteristics of the eluting mixture proportion in function of the time t from start of the elution are summarized in the tables below (a linear gradient being used between two consecutive time points):
• Example 1 4-[(5)-4-carboxy-2-( ⁇ 6-[2-(2-methoxy-ethoxy)-ethoxy]-2-phenyl-pyrimidine- 4-carbonyl ⁇ -amino)-butyryl]-piperazine-l-carboxylic acid ethyl ester:
• Example 2 4-((S)-4-carboxy-2- ⁇ [6-((i?)-2,2-dimethyl-[l,3]dioxolaii-4-ylmethoxy)- 2-phenyl-pyrimidine-4-carbonyl]-amino ⁇ -butyryl)-piperazine-l-carboxylic acid ethyl ester:
• Example 3 4-((5)-4-carboxy-2- ⁇ [6-((5)-2,3-dihydroxy-propoxy)-2-phenyl-pyrimidine- 4-carbonyl]-amino ⁇ -butyryl)-piperazine-l-carboxylic acid ethyl ester:
• Example 4 4-((5)-4-carboxy-2- ⁇ [6-((i?)-2,3-dimethoxy-propoxy)-2-phenyl-pyrimidine- 4-carbonyl]-amino ⁇ -butyryl)-piperazine-l-carboxylic acid ethyl ester:
• This compound was prepared using a method analogous to that of Example 1, step 1.2, intermediate 4.1 replacing intermediate 1.1.
• Example 7 4-((5)-2- ⁇ [6-(l-benzyl-piperidin-4-yloxy)-2-phenyl-pyrimidine-4-carboiiyl]- amino ⁇ -4-carboxy-butyryl)-piperazine-l-carboxylic acid ethyl ester trifluoroacetate salt:
• Example 8 4-((5)-4-carboxy-2- ⁇ [2-(4-fluoro-phenyl)-6-(tetrahydro-furan-3-yloxy)- pyrimidine ⁇ -carbonylj-aminoj-butyry ⁇ -piperazine-l-carboxylic acid ethyl ester:
• This compound was prepared using a method analogous to that of Example 1, step 1.1, intermediate 10.1 replacing l-(ethoxycarbonyl)piperazine. The compound was used in the next step without characterization.
• Example 11 4- [(5)-3-(4-carboxy-phenyl)-2-( ⁇ 2-phenyl-6- [(tetrahydro-furan-3-yl)oxy] - pyrimidine-4-carbonyl ⁇ -amino)-propionyl]-piperazine-l-carboxylic acid ethyl ester:
• Example 12 4-((5)-4-carboxy-2- ⁇ [2-phenyl-6-(piperidin-4-yloxy)-pyrimidine- 4-carbonyl]-amino ⁇ -butyryl)-piperazine-l-carboxylic acid ethyl ester:
• This compound was prepared using a method analogous to that of Example 5, step 5.2, intermediate 12.1 replacing intermediate 5.1.
• the compound was however worked up by diluting the residue in EA/water and adding a Na 2 CO 3 solution until pH 7.
• the org. layers were dried over Na 2 SC ⁇ and evaporated off.
• the crude was purified by CC (DCM to DCM/MeOH 9/1).
• Example 14 4-[(5)-4-cyano-2-( ⁇ 2-phenyl-6-[(tetrahydro-furan-3-yl)oxy]-pyrimidine- 4-carbonyl ⁇ -amino)-butyryl]-piperazine-l-carboxylic acid ethyl ester:
• Benzenesulfonyl chloride (19 g) was added to a solution of intermediate 14.1 (37.4 g) in dry pyridine (29.5 ml). The mixture was heated at 50 0 C for 1 h, and neutralized (pH 7) by adding a 2MHC1 solution. The mixture was extracted three times with EA. The combined org. phases were washed with a ⁇ M HCl solution, a NaHCO 3 solution and with water, dried over Na 2 SC ⁇ and evaporated to afford 3Og of the desired compound.
• LC-MS: t R 0.85 min; [M+H] + : 403.48.
• Example 15 4-((5)-4-carboxy-2- ⁇ [2-phenyl-6-(tetrahydro-furan-3-yloxy)-pyrimidine- 4-carbonyl]-amino ⁇ -butyryl)-piperazine-l-carboxylic acid ethyl ester:
• This compound was prepared using a method analogous to that of Example 1, step 1.2, intermediate 16.4 replacing intermediate 1.1.
• the compound was however purified by preparative LC-MS (III).
• Example 17 4-[(S)-2- ⁇ [2-phenyl-6-(tetrahydro-furan-3-yloxy)-pyrimidine-4-carboiiyl]- amino ⁇ -4-(lH-tetrazol-5-yl)-butyryl]-piperazine-l-carboxylic acid ethyl ester:
• Example 18 4-((5)-4-tert-butoxycarbonyl-2- ⁇ [2-phenyl-6-(tetrahydro-pyran-4-yloxy)- pyrimidine ⁇ -carbonylj-aminoj-butyry ⁇ -piperazine-l-carboxylic acid ethyl ester:
• Example 19 4-((5)-4-tert-butoxycarbonyl-2- ⁇ [6-(l-methyl-piperidin-3-yloxy)-2-phenyl- pyrimidine ⁇ -carbonylj-aminoj-butyry ⁇ -piperazine-l-carboxylic acid ethyl ester:
• Example 21 4-[(5)-3-(4-tert-butoxycarbonyl-phenyl)-2-( ⁇ 2-phenyl-6-[(tetrahydro-furan- 3-yl)oxy]-pyrimidine-4-carbonyl ⁇ -amino)-propionyl]-piperazine-l-carboxylic acid ethyl ester:
• Example 23 4-((5)-4-tert-butoxycarbonyl-2- ⁇ [2-phenyl-6-(2,2,6,6-tetramethyl-piperidin- 4-yloxy)-pyrimidine-4-carbonyl]-amino ⁇ -butyryl)-piperazine-l-carboxylic acid ethyl ester:
• Example 24 4-((5)-4-carboxy-2- ⁇ [6-(3-hydroxy-2-hydroxymethyl-propoxy)-2-phenyl- pyrimidine ⁇ -carbonylj-aminoj-butyry ⁇ -piperazine-l-carboxylic acid ethyl ester:
• Example 25 4-((5)-4-carboxy-2- ⁇ [2-phenyl-6-(tetrahydro-thiopyran-4-yloxy)- pyrimidine ⁇ -carbonylj-aminoj-butyry ⁇ -piperazine-l-carboxylic acid ethyl ester:
• Example 26 4-[(S)-4-carboxy-2-( ⁇ 2-phenyl-6-[(i?)-(tetrahydro-furaii-3-yl)oxy]- pyrimidine-4-carbonyl ⁇ -amino)-butyryl]-piperazine-l-carboxylic acid ethyl ester:
• Example 27 4-[(5)-4-carboxy-2-( ⁇ 2-phenyl-6-[(5)-(tetrahydro-furan-3-yl)oxy]- pyrimidine-4-carbonyl ⁇ -amino)-butyryl]-piperazine-l-carboxylic acid ethyl ester:
• This compound was prepared using a method analogous to that of Example 1, step 1.8, intermediate 28.3 replacing intermediate 1.7 and 3-hydroxytetrahydrofurane replacing 2-(2-methoxyethoxy)ethanol.
• the compound was however purified by preparative CC (DCM/MeOH/AcOH 95/4.5/0.5).
• This compound was prepared using a method analogous to that of Example 1, step 1.2, intermediate 29.1 replacing intermediate 1.1.
• This compound was prepared using a method analogous to that of Example 1, step 1.7, intermediate 29.4 replacing intermediate 1.2.
• the compound was however purified by CC (EA/Hept 3/7).
• Example 30 4-[(5)-4-carboxy-2-( ⁇ 2-phenyl-6-[(5)-(tetrahydro-furan-3-yl)oxy]- pyrimidine-4-carbonyl ⁇ -amino)-butyryl]-piperazine-l-carboxylic acid butyl ester:
• This compound was prepared using a method analogous to that of Example 5, step 5.2, intermediate 30.1 replacing intermediate 5.1.
• the compound was however purified by CC (EA to EA/MeOH 10/1).
• Example 31 4-[(S)-4-carboxy-2-( ⁇ 2-phenyl-6-[(i?)-(tetrahydro-furaii-3-yl)oxy]- pyrimidine-4-carbonyl ⁇ -amino)-butyryl]-piperazine-l-carboxylic acid butyl ester:
• Example 32 4-((5)-4-tert-butoxycarbonyl-2- ⁇ [6-(2,2-dimethyl-[l,3]dioxan-5-ylmethoxy)- 2-phenyl-pyrimidine-4-carbonyl]-amino ⁇ -butyryl)-piperazine-l-carboxylic acid ethyl ester:
• Example 33 4-((5)-4-tert-butoxycarbonyl-2- ⁇ [2-phenyl-6-(tetrahydro-thiopyran- 4-yloxy)-pyrimidine-4-carbonyl]-amino ⁇ -butyryl)-piperazine-l-carboxylic acid ethyl ester:
• Example 35 4-[(5)-4-tert-butoxycarbonyl-2-( ⁇ 2-phenyl-6-[(5)-(tetrahydro-furan- 3-yl)oxy]-pyrimidine-4-carbonyl ⁇ -amino)-butyryl]-piperazine-l-carboxylic acid butyl ester:
• Example 36 4-[(S)-4-fer ⁇ butoxycarbonyl-2-( ⁇ 2-phenyl-6-[(i?)-(tetrahydro-furaii- 3-yl)oxy]-pyrimidine-4-carbonyl ⁇ -amino)-butyryl]-piperazine-l-carboxylic acid butyl ester:
• Example 38 4-((5)-4-tert-butoxycarbonyl-2- ⁇ [2-phenyl-6-(piperidin-4-yloxy)- pyrimidine ⁇ -carbonylj-aminoj-butyry ⁇ -piperazine-l-carboxylic acid butyl ester:
• CHO cells with recombinant expression of the human P2Yi2 receptor were cultured in 24 well cell-culture plates. Cells were washed three times with binding buffer (50 mM Tris pH 7.4, 100 mM NaCl, 1 mM EDTA, 0.5 % BSA). The cells were then incubated with 0.5 ml per well binding buffer containing tritium-labeled 2-methyl- thio-adenosine 5 '-diphosphate (2 -methyl- S -ADP) (between 100'0OO and 300O00 dpm per well) and various concentrations of test compounds. After incubation at room temperature for 2 hours, cells were washed three times with binding buffer.
• binding buffer 50 mM Tris pH 7.4, 100 mM NaCl, 1 mM EDTA, 0.5 % BSA.
• the cells were then incubated with 0.5 ml per well binding buffer containing tritium-labeled 2-methyl- thio-adenosine 5
• IC 5 oS ranging from 12 nM to 1045 nM, with a mean value of about 190 nM, were measured for the compounds of the Examples 1 to 17, 24 to 31 and 37.

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